MODULAR SUNWAY TG
TE OD
INSTALLATION GUIDE
30/
139
Rev. 03
– 01/06//2018
The basic safety functions of the grid interface include the over/under frequency and the under/over voltage
thresholds.
Figure 7: Interface Protection diagram
The tripping values and times depend on the connection regulations in force in different countries. Other
measurements, both direct and derivative, may be considered for Interface Protection, depending on the
connection regulations in force in the country of installation.
The Interface Protection function may be performed by an external device or via the control software. The
two functions may also coexist and operate in parallel.
For all SUNWAY TG TE inverters, an Interface Protection function is incorporated in the control software
which acts on the Grid Connection Contactor. All the parameters relative to the tripping thresholds and times
are set in the factory depending on the designated geographical location of installation.
It is also possible to connect an external Interface Protection to SUNWAY TG TE inverters whenever this is
prescribed by the regulations in force (e.g. CEI 0-16 for Italy). See the X6 terminal board in the AC section,
contacts 17 and 18 in the Electrical and Mechanical Diagram.
For connection of an external Interface Protection, the protection acts with redundancy on inverter control:
•
The control software acquires the status of external Interface Protection in real time. In the event of
tripping the inverter stops and the Grid Connection Contactor is opened.
•
The external Interface Protection contacts are wired in such a way as to open the Grid Connection
Contactor.
The sudden tripping of the Interface Device may cause transients on the AC output line. This phenomenon
may occur to a higher or lesser degree depending on the characteristics of the system and the connected
loads. The wiring of the Interface Protection feedback signal contact minimizes these transients. Hence it is
advisable to ensure such wiring is made in all systems.
Operation of the SUNWAY TG TE inverters is in any case guaranteed regardless of the wiring of the
Interface Protection feedback signal contact.
The SUNWAY TG TE inverters are configured in the factory with an external Interface Protection input
enabled and a jumper on the AC.X8 terminal board (contacts 17 and 18). To acquire the status of the grid
from an external Interface Protection, remove the jumper and wire a normally excited NO contact on the
AC.X8 terminal board (contacts 17 and 18).
Please refer to section 6.4.4.
4.3.2. Grid connection contactor
The AC Grid Connection Contactor, located inside the cabinet, makes it possible to connect the MODULAR
SUNWAY TG TE OD to the grid.
Should the Interface Protection trip, or in the event of an alarm, the Grid Connection Contactor is opened
disconnecting the inverter from the grid and stopping it. The Grid Connection Contactor is the component
which can perform opening under load, sized for the maximum inverter output current. It is referred to in the
Electrical and Mechanical Diagram as 41KM1.
